20408734100

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{269}}^1\times {\mathrm{547}}^1$

素因数の和:922

約数の個数: 144

約数和(自身を含む): 47518833600

約数和(自身を除く): 27110099500

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 73, 76, 95, 100, 146, 190, 269, 292, 365, 380, 475, 538, 547, 730, 950, 1076, 1094, 1345, 1387, 1460, 1825, 1900, 2188, 2690, 2735, 2774, 3650, 5111, 5380, 5470, 5548, 6725, 6935, 7300, 10222, 10393, 10940, 13450, 13675, 13870, 19637, 20444, 20786, 25555, 26900, 27350, 27740, 34675, 39274, 39931, 41572, 51110, 51965, 54700, 69350, 78548, 79862, 98185, 102220, 103930, 127775, 138700, 147143, 159724, 196370, 199655, 207860, 255550, 259825, 294286, 373103, 392740, 399310, 490925, 511100, 519650, 588572, 735715, 746206, 758689, 798620, 981850, 998275, 1039300, 1471430, 1492412, 1517378, 1865515, 1963700, 1996550, 2795717, 2942860, 3034756, 3678575, 3731030, 3793445, 3993100, 5591434, 7357150, 7462060, 7586890, 9327575, 10741439, 11182868, 13978585, 14714300, 15173780, 18655150, 18967225, 21482878, 27957170, 37310300, 37934450, 42965756, 53707195, 55914340, 69892925, 75868900, 107414390, 139785850, 204087341, 214828780, 268535975, 279571700, 408174682, 537071950, 816349364, 1020436705, 1074143900, 2040873410, 4081746820, 5102183525, 10204367050, 20408734100]

約数ペア:

[(1, 20408734100), (2, 10204367050), (4, 5102183525), (5, 4081746820), (10, 2040873410), (19, 1074143900), (20, 1020436705), (25, 816349364), (38, 537071950), (50, 408174682), (73, 279571700), (76, 268535975), (95, 214828780), (100, 204087341), (146, 139785850), (190, 107414390), (269, 75868900), (292, 69892925), (365, 55914340), (380, 53707195), (475, 42965756), (538, 37934450), (547, 37310300), (730, 27957170), (950, 21482878), (1076, 18967225), (1094, 18655150), (1345, 15173780), (1387, 14714300), (1460, 13978585), (1825, 11182868), (1900, 10741439), (2188, 9327575), (2690, 7586890), (2735, 7462060), (2774, 7357150), (3650, 5591434), (5111, 3993100), (5380, 3793445), (5470, 3731030), (5548, 3678575), (6725, 3034756), (6935, 2942860), (7300, 2795717), (10222, 1996550), (10393, 1963700), (10940, 1865515), (13450, 1517378), (13675, 1492412), (13870, 1471430), (19637, 1039300), (20444, 998275), (20786, 981850), (25555, 798620), (26900, 758689), (27350, 746206), (27740, 735715), (34675, 588572), (39274, 519650), (39931, 511100), (41572, 490925), (51110, 399310), (51965, 392740), (54700, 373103), (69350, 294286), (78548, 259825), (79862, 255550), (98185, 207860), (102220, 199655), (103930, 196370), (127775, 159724), (138700, 147143)]